Apparatus for applying a lateral stripe of adhesive to the tail of a severed web



Nov. 4, 1969- J, w. HACKETT ETAL 3,475,079

APPARATUS FOR APPLYING A LATERAL STRIPE OF ADHESIVE TO THE TAIL OF A SEVERED WEB Filed Dec. 27, 1967 4.Sheets-Sheet 1 /\\li\'!'n/\S John W. Hockett Earl E. Gardner ATTORNEY N 1969 J. w. HACKETT ETAL 3,476,079

APPARATUS FOR APPLYING A LATERAL STRIPE OF ADHESIVE To THE TAIL OF A SEVERED WEB Filed D80. 196'? 4 Sheeis-Sheet 2 INVENTORS John W. HockeH Earl E. GOfdflEf BY I ATTORNEY HACKETT ETAL NOV. 4, w

' APPARATUS FOR APPLYING A LATERAL STRIPE OF ADHESIVE TO THE TAIL OF A SEVERED WEB 4 Shee Ls-Sheet Filed Dec 27.

INVENTORS Hocken Gardner John W. Earl E ATTORNEY Nov. 1969 J. w. HACKETT ETAL 3,476,079

APPARATUS FOR APPLYING A LATERAL STRIPE O1 ADHESIVE TO THE TAIL OF A SEVERED WEB Filed Dec. 27. 196'. 4 Sheets-Sheet &

INVENTORS John .W. HockeH Earl E, Gardner $wz4 Z M ATTORNEY United States Patent 3,476,079 APPARATUS FOR APPLYING A LATERAL STRIPE OF ADHESIVE TO THE TAIL OF A SEVERED WEB John W. Hackett, Greenhills, and Earl E. Gardner, Cincinnati, Ohio, assignors to The Procter & Gamble Company, Cincinnati, Ohio, a corporation of Ohio Filed Dec. 27, 1967, Ser. No. 693,875 Int. Cl. B05c 1/12 US. Cl. 118-40 9 Claims ABSTRACT OF THE DISCLOSURE An apparatus for applying a lateral stripe of adhesive just forward of the line of severance of a continuously moving web which includes a pair of glue rolls having a quantity of glue retained in the nip thereof, with one of said rolls being movable into glue transfer position without changing the nip distance between the glue rolls. A continuously driven and separately supported chopper roll is provided having a glue applicator and a cutting blade mounted on its periphery. At the appropriate time in the cycle, the one glue roll is moved into glue transferring position with respect to the applicator on the chopper roll which is thereupon moved downwardly such that the cutting blade severs a continuously moving web supported on a bed roll while the applicator is applying or printing a longitudinal stripe of adhesive across the entire width of the web just forward of the line of severance.

BACKGROUND OF THE INVENTION The invention relates to the field of continuous web winding machines, more particularly, it is specifically directed at a novel innovation to machines of this character whereby a continuously moving web can be severed at a predetermined line while a longitudinal stripe of adhesive is simultaneously applied to the tail just ahead of the line of severance such that the severed tail will be adhered to a completed roll.

The adherence of the free end or tail of a severed web to a completed roll in a continuous winding machine has been a particularly bothersome problem in the paper converting industry :for many years. There have been efforts to accomplish this objective by various means such as the application of adhesive by reciprocating glue dobbers or by the provision of glue ejection nozzles to provide adhesive on the newly severed tail as it passes beneath a glue application station. As a practical matter, however, none of these has been entirely effective as the use of known devices of this kind leads to an inordinate number of paper rolls in which the tails are not properly attached thus causing production and other attendant operating problems. A variety of other devices have been proposed for adhering tails some of which include the provision of a thermoplastic powder impregnated into the tail which is heated to achieve adherence thereafter; the provision of a water spray on the tail to cause sticking when later heated, and the application of a static charge on the tail to cause it to adhere to the completed roll. The large variety of devices that have been tried to solve this problem is just further evidence that the art has been looking for a universally satisfactory approach to this chronic problem for a considerable length of time.

SUMMARY OF THE INVENTION The nature and substance of the invention can be briefly summarized as an improvement in web winding machines having a bed roll and a chopper roll wherein the latter is suitably fitted with a longitudinal glue applicator and a cutting blade on its periphery, the chopper roll being continuously driven and suitably supported in spaced relaice tion to the bed roll. A pair of cooperating glue rolls are supported and driven in spaced relation to the chopper roll, the spacing between the glue rolls being such that a glue reservoir is formed above the nip of the rolls. Means are provided for pivoting one of said glue rolls around the axis of the other without changing the nip distance between the glue rolls. The operating sequence of the winder is established such that the transfer glue roll is lowered momentarily to permit a quantity of adhesive on its surface to be transferred to the applicator mounted on the periphery of the chopper roll. The chopper roll is then lowered toward the bed roll which supports a continuously moving paper web whereupon the blade severs the web while the applicator applies a lateral stripe of adhesive on the resulting web tail just forward of the line of severance. As a consequence, the severed tail of the web is adhered to its roll when wound thereon.

BRIEF DESCRIPTION OF THE DRAWINGS While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter regarded as forming the present invention, it is believed the invention will be better understood from the following description taken in connection with the accompanying drawings in which:

FIGURE 1 is a fragmentary side elevation of the apparatus of the invention, the various parts thereof being shown in their idling position.

FIGURE 2 is a fragmentary end elevation showing the ma or components of the apparatus and in particular the drive and gear box arrangement.

FIGURE 3 is a fragmentary end elevation of the mechanism for lowering and raising the transfer glue roll taken on the line 3-3 of FIGURE 2.

FIGURE 4 is a fragmentary perspective view showing the gear box with the various parts thereof in exploded relationship :for the purpose of illustrating the several components thereof and their inter-relationship.

FIGURE 5 is a schematic end elevation of the several major components of the apparatus in idling position.

FIGURE 6 is a schematic end elevation similar to FIGURE 5 in which the transfer glue r011 has been lowered to apply adhesive to the applicator on the chopper roll.

FIGURE 7 is a schematic end elevation similar to FIGURES 5 and 6 showing the lowered chopper roll severing the web and applying a lateral stripe of adhesive to the tail of the severed end.

FIGURE 8 is a fragmentary side elevation in cross section showing the glue rolls and a glue darn taken on the line 8-8 of FIGURE 2.

FIGURE 9 is a fragmentary view taken on the line 99 of FIGURE 8 and showing the inclination of a glue dam with respect to the glue rolls.

DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention is particularly useful for the winding of paper hand toweling material, toilet tissue material and the like, the particular product being wound, however, does not form any real limitation on the scope of the invention. The invention is suited for use with a web winding machine of the type illustrated and described in US. Patent 3,179,348 which issued to Ernst D. Nystrand et al. on Apr. 20, 1965. As described hereinafter the present improvement to web winders can be considered as being adapted to a winding machine of that type although it will be understood that it is equally well suited for use with other types of winders.

Referring to FIGURES 1 and 2 of the drawings, the elements of the present invention are illustrated and will be described in the context of being adapted to any conventional web winder having a perforator head and a continuously rotating drive shaft 11. The winding machine includes a support bar 12 interconnecting the side frames (not shown) on the winder, there being a pair of pivot pins 13 and 14 projecting inwardly from the side frames (not shown) on which the plate supports 15 and 16 are journaled. The bed roll 17 is suitably supported and continuously rotated in the winding machine there being a paper web 18 continuously moved thereover. The paper web 18 is continuously fed to suitable spools where it is wound to a predetermined length whereupon it is severed and adhesive applied to its tail by the apparatus to be described now in greater detail.

The present apparatus includes a continuously rotated chopper roll 19 the ends of which are suitably journaled in the support plates 15 and 16. A resilient applicator 20 is mounted laterally across the periphery of the chopper roll 19 there being a cutting blade 21 and a resilient member 22 mounted alongside the applicator 20 as seen in FIGURE 1. The chopper roll 19 is normally carried in the idling position, that is, a position where the applicator 20 and blade 21 are clear of the paper web 18 this being the position of the several parts as illustrated in FIGURES 1 and 5.

Arms 23 and 24 are attached to project from the connecting tube 25 which is normally stationary while being supported for rotational movement on the support bar 12. Link members 26 and 27 which are adjustable in length are pivoted to the arms 23 and 24 at one end and to the support plates 15 and 16 at the other end. Thus it will be apparent that rotation of the connecting tube 25 will raise or lower the chopper roll 19 through the linkage mechanism heretofore described. The mechanism for causing this movement will be described hereinafter.

Suitable mechanism is provided for periodically transferring adhesive or glue to the applicator 20 on the chopper roll 19 just prior to its being lowered for severing the web. This mechanism includes a pair of glue rolls comprising a transfer roll 28 and a split pair of metering rolls 29 and 29a which are suspended and supported from the hanger brackets 30, 31, and 32, the latter being permanently attached to the perforator head 10. The torque tube 33 (see FIGURE 1) is journaled in the end hanger brackets 30 and 32 such that the metering rolls 29 and 29a are free to rotate on the torque tube 33. Torque arm supports 34a and 34c are mounted for pivotal movement on the torque tube 33; the center torque arm 34b is pinned to the torque tube 33. The transfer roll 28 has its ends journalled in the outer torque arm supports 34a and 34c. Torque arms 35a and 35b are pinned to the torque tube 33 and are also joined to the torque arm supports 34a and 34c, respectively.

The glue rolls 28 and 29, 29a are continuously rotated by the motor and gearbox drive 36 projecting from the perforator head 10. A chain drive is provided for continuously rotating the glue rolls which includes the sprockets 37, 38 and 39 as well as the endless chain 40 running thereover. The gear pairs 41-42 and 43-44 provide a positive counter-rotating driving action between the glue rolls 28 and 29, 29a, the rotation of the rolls being such that the surfaces of the rolls move gen erally downwardly from their nip.

A plurality of glue dams 45, 46, 47 and 48 are mounted as shown in FIGURE 2 between the gears at the ends of the glue rolls and the center torque arm 34b. The dams are suitably contoured with respect to the periphery of the glue rolls 28 and 29, 29a and extend downwardly as shown in FIGURE 8 to provide an adhesive or glue reservoir above the nip of the rolls 28 and 29, 29a. In addition, each dam, e.g., the dam 48 in FIGURE 9, is mounted at an angle a of from about 30 to about 80, preferably about 70, with respect to the plane of the axes of the glue rolls. The inclination of the dams with respect to the glue rolls causes a helical backfiow action on the glue and prevents outflow from the ends of the glue rolls 28 and 29, 29a. The nip clearance between the glue rolls 28 and 29, 29a is kept at a minimum and maintained precisely such that only a thin film of adhesive is formed on each glue roll without any drippage therefrom.

Suitable glue or adhesive is fed by conventional means (not shown) to the reservoirs between the glue rolls 28 and 29, 29a and the dams 45, 46, 47 and 48. A predetermined level of glue is maintained in the reservoirs. The transfer roll 28 is pivoted with respect to the axis of the metering roll 29 by means of the center torque arm 34]; at a predetermined time in the operating cycle by a mechanism to be described. This causes the glue from the surface of the roll 28 to be wiped ofi or transferred to the applicator 20 in the manner illustrated in FIGURE 6. The above described support mechanism permits pivot of the transfer roll 28 on the axis of the metering rolls 29 and 29a in order to avoid any change in the roll-to-roll nip clearance.

A mechanism which includes a gear box is provided for timing and periodically actuating the glue transfer sequence and the lowering and raising of the chopper roll 19. The gear box mechanism is best illustrated in FIGURES 2 and 4 and will be referred to herein by the general reference numeral 49.

The gear box 49 includes spaced side plates 50 and 51, a bottom plate 52 and a top plate 53. The side plates 50 and 51 are provided, respectively, with rearwardly and downwardly extending lugs 54 (FIGURE 1) and 54a (FIGURE 3) which are pivoted on an extended pin 55 (FIGURES l and 3) journalled in the ears 56 (FIGURE 1) and 57 (FIGURE 3).

A support yoke 58 (FIGURES 1 and 2) extends from the perforator head 10 and is pivoted at one end to the bracket 59, the other end of the yoke 58 being pivoted to the side-by-side brackets 60 and 61 which in turn are secured to the top plate 53. Thus it will be noted that the entire gear box 49 is attached by means of two pivotable supports which allows it to move as a unit as will be more fully explained hereinafter.

FIGURES 1 and 4 illustrate the gear box drive from the drive shaft 11 which comprises a sprocket 62 attached to the shaft 11, an idler sprocket 63 and a drive sprocket 64 all of which are driven continuously by the endless chain 65. The drive sprocket 64 in turn is secured to the shaft 66 which extends through the gear box and is journaled in the side plates 50 and 51. Shafts 67 and 68 are similarly supported between the side plates 50 and 51.

A pinion 69 is secured to the shaft 66 to drive the gear 70 attached to the shaft 68. Gears 71 and 72 are both keyed to the shaft 68 and the latter is in driving engagement with the gear 73 attached to the shaft 67 which also has the pinion 74 pinned thereto. The outer end of the shaft 68 has an adjustable drop cam 75 secured there- A pair of control cams actuate and properly time the lowering of the chopper roll. That is, the roll cam 76 is attached to the gear 77, the combination being mounted for free rotation on the shaft 66 with the gear 77 being continuously driven by the gear 71. Similarly, the timing cam 78 is attached to the gear 79, the combination being mounted for free rotation on the shaft 66 with the gear 79 being driven by the pinion 74. The gear ratios in the gear box are such that the roll cam 76 rotates nine times per machine cycle whereas the timing cam 78 is rotated only one revolution on each machine cycle. It will be apparent, of course, that the speed ratio between the roll cam 76 and the timing cam 78 can be varied as desired. In general, the roll cam will rotate at several times the speed of the timing cam usually a ratio of at least about 5:1.

A cam roller arm 80 having cam followers 81 and 82 mounted on either side thereof has its inner end secured to the connecting tube 25 as best illustrated in FIGURE 2. Normally the follower 82 rides on the high dwell of the timing cam 78 except when it passes over the low part of the profile of the timing cam 78 at which point the follower 81 is deposited on the high dwell of the roll cam 76. Because of the difference in rotational speeds of the cams 76 and 78, the low part of the profile of the roll cam 76 passes beneath the follower 81 nine times per cycle. However, since the timing cam 78 rotates once per machine cycle, the arm 80 will be supported by the follower 82 on the high dwell of the timing cam 78 on eight of the nine rotations of the roll cam 76. Once every nine revolutions of the roll cam 76, the low portion of the profiles on both cams 76 and 78 will be aligned. This will allow the cam roller arm 80 to pivot the connecting tube 25 on the support bar 12 thereby lowering the chopper roll 19 into the cutting and glue application position as illustrated schematically in FIGURE 7. The lowering force is provided by the weight of the chopper roll 19.

The mechanism for periodically pivoting the transfer glue roll 28 at the proper time of the machine cycle is provided outside the gear box 49 alongside the side plate 51 as partially illustrated in FIGURE 4 and more clearly seen in FIGURE 3. A cam roller plate 84 having a roller follower 85 secured thereto (see FIGURE '2) is pivoted on the pin 55 and normally held upwardly out of engagement with the adjustable drop cam 75 by means of an air cylinder 86 one end of which is attached to the perforator head the lower end being secured to the roller plate 84 as illustrated in FIGURE 3. An adjustable guide 87 is mounted on the side face of the plate 84. The position of the guide 87 can be controlled by means of the adjusting screw 88. The projecting end 89 of the guide 87 engages an opening in the center torque arm 34b as best illustrated in FIGURE 2. Thus it will be apparent that when the roller plate 84 is pivoted around the pin 55, the engagement of the projecting end 89 in the center torque arm 34b will cause raising or lowering, as the case may be, of the transfer glue roll 28.

The complete operating sequence of the web severing and glue applicator device of the present invention will now be described with particular reference to FIGURES 5, 6, and 7 which show the successive stages of the sequence. Normally, the several parts of the apparatus assume the idling position illustrated in FIGURE 1 which, as aforesaid, corresponds to the schematic showing of FIGURE 5. In this position, the chopper roll 19 is rotating freely and continuously and the glue rolls 28 and 29, 29a are doing likewise while retaining the adhesive 90 in the nip reservoir therebetween.

As the apparatus nears the desired cut-off point in its operating cycle, the air cylinder 86 is actuated forcing the roller plate 84 to pivot downwardly on the pin 55. This causes the follower 85 to bear against the profile of the drop cam 75 and an initial downward movement of the glue transfer roll 28 as a consequence of the pushing force exerted by the guide 87 against the center t rque arm 34b. At this point, however, the glue roll 28 does not contact the applicator 20 as the plate 84 and the glue roll 28 are held in an intermediate position by the high dwell of the cam 75.

As the low portion of the profile of the drop cam 75 moves beneath the roller 85, the cam roller plate 84 is pivoted further such that during the next revolution of the chopper roll 19, the applicator 20 wipes off a portion of the glue on the surfrace of the glue transfer roll 28 (FIG- to pass through the same sequence at the appropriate time such that the applicator 20 will only wipe against the transfer roll 28 once although, of course, it could be designed to wipe over the transfer roll surface any number of additional times if so desired. The glue transfer roll 28 is then lifted to its original idling position by the coaction of the drop cam 75 acting on the roller 85 and subsequently the air cylinder 86 being drawn upwardly such that the follower 85 is removed from contact with the profile of the drop cam 75.

Immediately thereafter, the chopper roll 19 is moved through its cycle. This comes about because of the roll arm being lowered once per cycle by virtueof the follower 81 bearing on the roll cam 76 when the low spot of the profile of the timing cam 78 passes beneath the follower 82. During this brief period, the cam roll arm 80 is pivoted thus causing the entire connecting tube 25 to turn through a limited arc. As a consequence, the weight of the chopper roll 19 causes it to be lowered to the position illustrated in FIGURE 7 through the mechanism comprising the arms 23, 24, the link members 26, 27, and the support plates 15, 16.

In this lowered position it will be noted the applicator 20 contacts the surface of the web 18 and this in effect prints or transfers a lateral stripe of adhesive across the entire width of the web thus subsequently causing the tail to be adhered to the completed roll. The tail is formed as the blade 21 passes over the bed roll 17 such that the web is severed by the blade 21 which engages a pair of momentarily extended parallel blades 91 and 91a projecting beyond the surface of the bed roll as illustrated in FIG- URE 7. The roll cam 76 then raises the arm 80 thereby returning the mechanism to its original idling position supported by the timing cam 78 as illustrated in FIG- URES l and 5. The entire apparatus is then in position to pass through the same sequence at the appropriate time in the overall machine cycle.

It will be apparent to skilled workers in the art that various forms of mechanical, pneumatic, hydraulic or electrical actuating may be employed for the various operating components of the device and that the actuating or operating circuits for these components will vary accordingly. However, with these teachings as a guide, the necessary circuit means for carrying out the objectives of the invention will be readily apparent to the skilled worker in the art.

While particular embodiments of the invention have been illustrated and described it will be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention and it is intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

What is claimed as new is:

1. Apparatus for applying a stripe of adhesive to the tail of a web comprising a rotating bed roll, a paper web running over said bed roll, a rotating chopper roll having a cut-off blade mounted on its periphery, said chopper roll being rotatably driven in timed relation to said bed roll, means for normally maintaining said bed roll and said chopper roll in spaced relationship, a glue applicator mounted longitudinally on the periphery of said chopper roll, means for periodically applying glue to said applicator, and means for moving said chopper roll toward said bed roll whereby said blade severs said web and said applicator prints a longitudinal glue stripe on the tail just forward of the line of severance of said web such that said tail can be adhered to a completed roll.

2. Apparatus for applying a stripe of adhesive to the tail of a web as claimed in claim 1 wherein said means for periodically applying adhesive to said applicator comprises a pair of glue rolls including a transfer roll and metering roll and means for pivoting said transfer roll into surface contacting relationship with respect to said applicator thereby transferring glue thereon.

3. Apparatus for applying a stripe of adhesive to the tail of a web as claimed in claim 2 wherein said glue rolls are rotated in opposite directions with the nip between the rolls acting as a glue reservoir, the glue carried through said nip forming a film on the surface of each of said glue rolls.

4. Apparatus for applying a stripe of adhesive to the tail of a web as claimed in claim 3 wherein said transfer roll is pivoted on an axis coinciding with the axis of said metering roll whereby the transfer roll is moved without changing the roll-to-roll nip clearance.

5. Apparatus for applying a stripe of adhesive to the tail of a web as claimed in claim 1 wherein said means for moving said chopper roll comprises a connecting tube and means for periodically rotating said connecting tube subsequent to the activation of said glue application means to lower said chopper roll into contacting relationship to said web whereby said cut-off blade severs said web behind said stripe of adhesive.

6. Apparatus for applying a stripe of adhesive to the tail of a web as claimed in claim 5 wherein said means for rotating said connecting tube includes a cam roller arm having a pair of cam followers riding on a roll cam and a timing cam respectively, means for rotating such roll cam at least five times per machine cycle and means for rotating said timing cam once per machine cycle.

7. Apparatus for applying a stripe of adhesive to the tail of a web as claimed in claim 5 wherein said means for periodically applying adhesive to said applicator comprises a pair of glue rolls including a transfer roll and a metering roll and means for pivoting said transfer roll into surface contacting relationship with respect to said applicator thereby transferring glue thereon.

8. Apparatus for applying a stripe of adhesive to the tail of a web as claimed in claim 7 wherein said transfer roll is pivoted on an axis coinciding with the axis of said metering roll whereby the transfer roll is moved without changing the roll-to-roll nip clearance.

9. Apparatus for applying a stripe of adhesive to the tail of a web as claimed in claim 8 wherein said means for moving said chopper roll comprises a connecting tube and means for periodically rotating said connecting tube subsequent to the activation of said glue application means to lower said chopper roll into contacting relationship to said web whereby said cutoff blade severs said web behind said stripe of adhesive.

References Cited UNITED STATES PATENTS 2,552,926 5/1951 Barnes et al 118-40 2,957,450 10/ 1960 Phillips 11840 3,063,408 11/ 1962 Gustafson et al. 11840 WALTER A. SCHEEL, Primary Examiner R. I. SMITH, Assistant Examiner qg gg g UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent 3,476,079 Dated November 4, 1969 Inventor) John W. Hackett and Earl E. Gardner It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 5, line 66 delete "surfrace" and insert surface Column 5, line 67, delete "to pass through the same sequence at the appropriate time" and insert URE 6 In this phase of the cycle, the apparatus is timed Column 6 line 64 after the word "and" insert a SIGNED AND SEALED MAY 121979 (SEAL) Attest:

Edward M. Fletchcni WILLIAM summer;

hugging Officer Commissi'mer of Pat 

